His friend Nicole Cairns, 19, had messaged unsuspecting Law, 20, and asked if he would like to come to her flat.

He travelled from East Kilbride, Lanarkshire, with Mather, 20, to nearby Hamilton where Cairns stayed.

However they were confronted by thug Richardson, 20, who was wearing a hoodie, a surgical mask and brandishing a blade who screamed “give us your money, drink, all of your stuff” while waving the knife in their faces.

He also claimed Law had been “getting wide on Facebook” before attacking the terrified friends.

Law was cut on the lip as the tip of the blade sliced the skin but he managed to fight Richardson off. Cairns and three other girls ran out of the flat armed with wooden table legs and began battering Mather.

Connor Mather was also slashed after going with Law to house in Hamilton

Eventually the pair managed to escape but not before both had been slashed by a crazed Richardson.

Law was struck in the abdomen while Mather was hit on the left side of his chest and ear during the surprise attack.

Richardson and mum-of-one Cairns denied the assaults in November 2015 and went on trial at Hamilton Sheriff Court but a jury took less than an hour to convict them of attacking Law and Mather to their injury.